mirror of
https://github.com/torvalds/linux.git
synced 2024-11-30 16:11:38 +00:00
121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/*
|
|
* w1_smem.c
|
|
*
|
|
* Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru>
|
|
*
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the smems of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <asm/types.h>
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/moduleparam.h>
|
|
#include <linux/device.h>
|
|
#include <linux/types.h>
|
|
|
|
#include "w1.h"
|
|
#include "w1_io.h"
|
|
#include "w1_int.h"
|
|
#include "w1_family.h"
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
|
|
MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol, 64bit memory family.");
|
|
|
|
static ssize_t w1_smem_read_name(struct device *, struct device_attribute *attr, char *);
|
|
static ssize_t w1_smem_read_bin(struct kobject *, char *, loff_t, size_t);
|
|
|
|
static struct w1_family_ops w1_smem_fops = {
|
|
.rname = &w1_smem_read_name,
|
|
.rbin = &w1_smem_read_bin,
|
|
};
|
|
|
|
static ssize_t w1_smem_read_name(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
|
|
|
|
return sprintf(buf, "%s\n", sl->name);
|
|
}
|
|
|
|
static ssize_t w1_smem_read_bin(struct kobject *kobj, char *buf, loff_t off, size_t count)
|
|
{
|
|
struct w1_slave *sl = container_of(container_of(kobj, struct device, kobj),
|
|
struct w1_slave, dev);
|
|
int i;
|
|
|
|
atomic_inc(&sl->refcnt);
|
|
if (down_interruptible(&sl->master->mutex)) {
|
|
count = 0;
|
|
goto out_dec;
|
|
}
|
|
|
|
if (off > W1_SLAVE_DATA_SIZE) {
|
|
count = 0;
|
|
goto out;
|
|
}
|
|
if (off + count > W1_SLAVE_DATA_SIZE) {
|
|
count = 0;
|
|
goto out;
|
|
}
|
|
for (i = 0; i < 8; ++i)
|
|
count += sprintf(buf + count, "%02x ", ((u8 *)&sl->reg_num)[i]);
|
|
count += sprintf(buf + count, "\n");
|
|
|
|
out:
|
|
up(&sl->master->mutex);
|
|
out_dec:
|
|
atomic_dec(&sl->refcnt);
|
|
|
|
return count;
|
|
}
|
|
|
|
static struct w1_family w1_smem_family_01 = {
|
|
.fid = W1_FAMILY_SMEM_01,
|
|
.fops = &w1_smem_fops,
|
|
};
|
|
|
|
static struct w1_family w1_smem_family_81 = {
|
|
.fid = W1_FAMILY_SMEM_81,
|
|
.fops = &w1_smem_fops,
|
|
};
|
|
|
|
static int __init w1_smem_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = w1_register_family(&w1_smem_family_01);
|
|
if (err)
|
|
return err;
|
|
|
|
err = w1_register_family(&w1_smem_family_81);
|
|
if (err) {
|
|
w1_unregister_family(&w1_smem_family_01);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit w1_smem_fini(void)
|
|
{
|
|
w1_unregister_family(&w1_smem_family_01);
|
|
w1_unregister_family(&w1_smem_family_81);
|
|
}
|
|
|
|
module_init(w1_smem_init);
|
|
module_exit(w1_smem_fini);
|